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Chapter 28. Java Reporting Components > Common Programming Tasks

Common Programming Tasks

The different delivery mechanisms for the report viewer have been discussed. Now let's look at some of the common programming tasks that go along with delivering reports. This includes passing parameters to the report viewer and setting or changing the data source. The following sections will discuss these topics.

Passing Parameters

One of the most common programming tasks with any Crystal product is to pass parameters to the report viewer. This really isn't a hard task but developers often find this difficult because of a lack of proper examples in the product documentation. This chapter will attempt to provide concrete examples. Typically, reports are designed to be dynamic and so have multiple parameters that drive how the report functions. There are two ways to handle parameters: either have the report viewer prompt the user for the parameters automatically or pass the parameter values via code. Which method you choose is determined largely by whether you want the users to pick their own parameter values themselves.


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